Fort Worth daily gazette. (Fort Worth, Tex.) 1882-1891, 1887-04-01
POPULAR SCIENCE.
Practical Items of Discovery for Practical
People.

Practical Items of Discovery for Practical
People.
It is asserted by some of the highest
medical authorities that lime-water and
milk are not only food and medicine at
an early period of life, but also at 8 later,
when, as in the case of infants, the
functions of digestion and assimilation
are feeble and easily perverted. II is
found that stomach taxed by gluttony,
irritated by improper food, inf4med by
alcohol, enteebled by disease or other
wise untitled for it's duties-as is shown
by the various symptoms attendant
upon indigestion, dyspepsia, GiarThRa,
dysentery and fever-will resume it's
work, and do it energeticallY, on en- ex-
elusive diet of bread and milk and lime
water. A goblet of cows milk may have
four tablespOOnfus of lime-water added
to 1t with good effect; the Underwater may
be made by putting few Jumps of I'm
Stacked lime into a stone Jar and adding
water until the lime IS stacked and of
about the cOnsistence of thick cream
the lime settling and leaving the pure and
clean lime-water on top.
soft alloy for soldering articles that
Will not stand higher temperature, such
as glass or porcelain, may be made from
the following recipe: Copper dust, OBJ
tanned by precipitation from solution of
the sulpnate by means OF zinc, is mixed
with q strong sulphurC acid, specific
gravity So, IN cast-irOn or porcelain
lined mortar. From twenty to
thirty-six parts of the dust are
used, according to the desired hardness.
To this cake there are stirred in
seventy parts of mercury. When well
mixed the amalgam is carefully rinsed
with warm water to remove the acid and
then set aside Is cool. In ten or twelve
hours it is hard enough to scratch tin,
and IT it is to be used now it must be
heated so hot that whea worked over in a
mortar it becomes as soft as wax In
this form it can be spread out on any
surface, to which it adheres with great
tenacity when 1t gets cold and hard.
A writer in the Chemical News points
out the advantages of employing nickel
dishes and crucibles in the laboratory.
BY experiment he finds that crucibles of
pure nickel are quite as serViceable as
those made of platinum, while |
only costing one-tenth as much !
They do not lose weight when |
heated; they stand the action |
OF alkalies remarkably well, and are par
ticularly useful in taking water residues |
and milk solids. They may be cleaned !
oy the use of cold hydrOChlOriC acid, either |
or dilute, without loss of |
weight; cold sulphuric acid is likewise |
without action; but nitric acid attacks
them, causing rapid loss of weight.
The true marine glue is a composition
OF shellac and india-rubber, in proper
lions which vary according to thp pur-
pose for which the cement is to be used.
The degree OF sOftness is regulated by
the proportion of benzine used for dissoly-
ng the india-rubber. When ony q small
quantity is needed the following recipe may
De followed: Dissolve one part Of india
'ubber In twelve parts Ct benZine, and to
he solution add twenty parts Of pow
Tered shellac, heating the mixture eau
iously over a fire. Apply with q brush.
Wooden cells for primary or secondary
battery are made tight and acid proof by
his compound.
Bruises may be taken out Of the wood
work of scientific instruments by wettlng
With warm water. Then lay On the
)lace brown paper about five layers
hick end apply hot fat-iron
lntil the moisture be evaporated. If
he bruise be not gone repeat the pro- :
ess. If the bruise be small, merely soak
t with warm Wster and apply red-hot
,oker very near the surface. Keep the {
wood wet, and in few minutes the {
ruise will disappear.
Paraffile has a higher resistance than
MICA, gutta- percha or shellac. Even 6
when not subjected to mechanical l
trains it becomes cracked, though the
peniEgs are not visible to the eye t
me insulating power becomes les I
ened, especially if it be in contact with s
water. OF all the varieties that are sold T
nder the name Of paraffine. only that
Which has the highest boiling point and is z
lear and hard should be used.
French physicians claim to have found t
ut by experiments upon rabbits that [
may be cured by S
he administration of tannIn. Over q
fly cases of phthisis have been I
reated by giving tannin in does of from r
wo to four grains daily, and improve +
lent was perceptible in two weeks, the {
atient increasing in weight. t
Preliminary tests have shown that iron
ooled while strong current of electrici- I
? was passing through it was increased T
lily Oue-hslf IN tensile strength and due I
lily. 7
a compound of common salt, alum, a
)lUble glass and tungstate of Soda is |
used III Austria and Swift
erland for the extinction of fires. p